iPadOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-07-16T17:39:03Z. The update package is 142.09 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: baa4efc31dc896bf1ef63694139ef4f416182fe3.zip.